| 摘要 |
<p>An offset drawhook system that eliminates one or more of the pins that have been commonly employed in the past to link the components of offset drawhook systems. In the preferred system, draft loads (19) on the drawhook linkages (12) are transmitted to a shock absorbing plunger (16) and to a pivot bar by a lever (14), without pinned connections therebetween. The pivot bar acts as a fulcrum (18A) between the drawhook linkage and the plunger. The lever preferably engages in rolling contact with the drawhook linkage, plunger and pivot bar as the drawhook linkage moves between a retracted position and an extended position. The angular displacement of the lever changes the pivot point at which the lever pivots about the pivot bar, and also changes the point at which the lever arm engages the other components. The rolling contact reduces wear on the surfaces of the respective components, and also enables a mechanical advantage to be provided to the plunger (16) as draft loads on the drawhook linkage (12) increase.</p> |
